OBJECTIVE: Long-term electroencephalogram (EEG) monitoring broadens EEG applications to various areas, but it requires cap-free recording of EEG signals. Our objective here is to develop a capacitive, small-sized, adhesive and biocompatible electrode for the cap-free and long-term EEG monitoring. APPROACH: We have developed an electrode made of polydimethylsiloxane (PDMS) and adhesive PDMS for EEG monitoring. This electrode can be attached to a hairy scalp and be completely hidden by the hair. We tested its electrical and mechanical (adhesive) properties by measuring voltage gain to frequency and adhesive force using 30 repeat cycles of the attachment and detachment test. Electrode performance on EEG was evaluated by alpha rhythm detection and measuring steady state visually evoked potential and N100 auditory evoked potential. MAIN RESULTS: We observed the successful recording of alpha rhythm and evoked signals to diverse stimuli with high signal quality. The biocompatibility of the electrode was verified and a survey found that the electrode was comfortable and convenient to wear. SIGNIFICANCE: These results indicate that the proposed EEG electrode is suitable and convenient for long term EEG monitoring.
OBJECTIVE: Long-term electroencephalogram (EEG) monitoring broadens EEG applications to various areas, but it requires cap-free recording of EEG signals. Our objective here is to develop a capacitive, small-sized, adhesive and biocompatible electrode for the cap-free and long-term EEG monitoring. APPROACH: We have developed an electrode made of polydimethylsiloxane (PDMS) and adhesive PDMS for EEG monitoring. This electrode can be attached to a hairy scalp and be completely hidden by the hair. We tested its electrical and mechanical (adhesive) properties by measuring voltage gain to frequency and adhesive force using 30 repeat cycles of the attachment and detachment test. Electrode performance on EEG was evaluated by alpha rhythm detection and measuring steady state visually evoked potential and N100 auditory evoked potential. MAIN RESULTS: We observed the successful recording of alpha rhythm and evoked signals to diverse stimuli with high signal quality. The biocompatibility of the electrode was verified and a survey found that the electrode was comfortable and convenient to wear. SIGNIFICANCE: These results indicate that the proposed EEG electrode is suitable and convenient for long term EEG monitoring.
Authors: Yoshiaki Hattori; Leo Falgout; Woosik Lee; Sung-Young Jung; Emily Poon; Jung Woo Lee; Ilyoun Na; Amelia Geisler; Divya Sadhwani; Yihui Zhang; Yewang Su; Xiaoqi Wang; Zhuangjian Liu; Jing Xia; Huanyu Cheng; R Chad Webb; Andrew P Bonifas; Philip Won; Jae-Woong Jeong; Kyung-In Jang; Young Min Song; Beatrice Nardone; Michael Nodzenski; Jonathan A Fan; Yonggang Huang; Dennis P West; Amy S Paller; Murad Alam; Woon-Hong Yeo; John A Rogers Journal: Adv Healthc Mater Date: 2014-03-26 Impact factor: 9.933